Hi. Every kind of virtualization is affected according to qemu developers. 9 янв. 2018 г. 9:32 пользователь "Pierre-Luc Dion" <pd...@cloudops.com> написал:
> Hi, > > From recent blog post, I've read that system using full virtualization such > as KVM, VMware or Xen-HVM are not affected? Anyhow, from the latest hotfix > of XenServer 7.1cu1 hf8, it look like they systematically convert VM from > PV to HVM, so in the case of a VM stop/start by CloudStack, a PV vm would > be restarted as HVM. > > Look like this could be problematic if your VM kernel does not support > both, we've just starting tested and so far look like our Debian systemvm > template work fine, it can be created as HVM. > > Another point is that Citrix released an hotfix for xs7.2, 7.3 but not for > 7.1, you need to cumulative update to remain on 7.1 which is LTS. > > And last, does anyone did some benchmark before and after the kernel fix > for Meltdown ? Some report state 30-35% cpu usage increase (not hypervisor > specific) and Lucian [1] might indicate it would depend on the cpu model. > Any metrics to share ? We are doing some tests on our side we should be > able to share some stuff soon... > > Regards, > > [1] http://markmail.org/thread/wkzze3n24mns274x >
